Square Enix has shown us a lot of Dungeon Siege III characters in the form of trailers lately, but this time, the newest trailer isn't an ally. This one's actually to remind us that the title is a co-op RPG. Fellow players can join and leave a game anytime, with the computer simply taking over if you leave your character idle for a certain amount of time while in co-op. This is said to be inspired by that of the Lego games.

Here's the co-op in action:

Dungeon Siege III (PC, PlayStation 3, Xbox 360) is due out in North America on June 21st.